Cationic silicones

ABSTRACT

CATIONIC BIS(TRIMETHYLSILOXY)SILOXANES OF THE FORMULA:   MD&#39;&#39;XM   WHEREIN M IS THE TRIMETHYLSILOXY UNIT, ME3SIO1/2, X IS AN INTEGER OF 1 TO 3, PREFERABLY 1, AND D&#39;&#39; IS A CATIONIC DIFUNCTIONAL SILOXY UNIT OF THE FORMULA:   X(-)(C6H5-N(+)(-R)2-R0-(O)T-SI(-CH3)(-O-)-)   WHERE R0 IS A DIVALENT ORGANIC GROUP, T IS 0 OR 1, R IS METHYL OR ETHYL, C6H5 IS A PHENYL RADICAL AND X IS AN ANION. ALSO THE TERTIAARY AMINO BIS(TRIMETHYLSILOXY) SILOXANES OF THE FORMULA MDXM WHEREIN M AND X ARE AS DEFINED ABOVE AND D IS A TERTIARY AMINO DIFUNCTIONAL SILOXY UNIT OF THE FORMULA:   R-N(-C6H5)-R0-(O)T-SI(-CH3)(-O-)-   WHEREIN R, R*, T AND C6H5 ARE AS DEFINED ABOVE, WHICH ARE USED IN PREPAARING THE ABOVE CATIONIC SILOXANES. THE ABOVE CATIONIC SILOXANES ARE USEFUL AS EMULSIFIERS, E.G., FOR WATER-POLY(DIMETHYLSILOXANE) OIL SYSTEMS, BACTERIOCIDES, ANTISTATIC AGENTS, WETTING AGENTS AND MOLD RELEASE AGENTS.

United States Patent (@ifice 3,836,559 Patented Sept. 17, 1974 US. Cl. 260-448.2 N 2 Claims ABSTRACT OF THE DISCLOSURE 7' Cationic bis(trimethylsiloxy)siloxanes of the formula:

whe rein M is the trimethylsiloxy unit, Me SiO x is an integer of 1 to 3, preferably 1, and D is a cationic difunctional siloxy unit of the formula:

wherein R is a divalent organic group, t is or 1, R is methyl or ethyl, C H is a phenyl radical and X is an anion.

Also the tertiary amino bis(trimethylsiloxy) siloxanes of the formula MD M wherein M and x are as defined above and D is a tertiary amino difunctional siloxy unit of the formula:

wherein R, R", t and C H are as defined above, which are used in preparing the above cationic siloxanes.

The above cationic siloxanes are useful as emulsifiers, e.g., for water-poly(dimethylsiloxane) oil systems, bacteriocides, antistatic agents, wetting agents and mold release agents.

This application is a divisional of US. application 887,428, filed Dec. 22, 1969, now US. Pat. 3,658,867.

This invention relates to novel organosilicon compounds, and, more particularly, to novel low molecular weight siloxanes containing quaternary nitrogen-containing groups or tertiary amine organo groups bonded to carbon.

High molecular weight siloxanes containing quaternary ammonium groups are disclosed in US. Pat. No. 3,278,465. Such materials have been found to be useful in the manufacture of certain types of polyurethane foams, e.g., those produced from polyether polyols, by the so-called one-shot technique disclosed in this patent. However, in the production of other types of polyurethane foams by the so-called one-shot technique the high molecular weight siloxanes of this patent either fail to perform adequately or fail completely. For example, in manufacturing polyester polyurethane foams by the oneshot method using the high molecular weight siloxanes of this patent as stabilizers the foam collapses or is of very poor quality. Quaternary ammonium salts of siloxanes are also disclosed in US. Pat. No. 3,402,191 and British Pat. No. 1,164,581.

It has been found, according to the present invention, that a certain class of novel cationic siloxanes containing quaternary nitrogen as defined herein possess unique properties which render them far superior to the heretofore known siloxanes of a similar nature in such uses as the production of highly effective fire-fighting foams which are capable of forming spreading, vapor-securing films on liquid hydrocarbons such as gasoline, the production of high quality polyurethane foams by mechanical frothing techniques, or the production of high quality polyester polyurethane foams by the one-shot tech:

mques.

The novel cationic siloxanes of this invention are the cationic bis(trimethylsiloxy) siloxanes having the formula:

MD' M wherein M is the trimethylsiloxy unit, Me SiO x is an integer of l to 3, preferably 1, and D' is a cationic difunctional siloxy unit of the formula:

( X-IRaI IR(O),Si(Me) 0 wherein R is a divalent organic group free of aliphatic unsaturation and having 2 to 18 carbon atoms, selected from the class consisting of divalent hydrocarbon groups, hydroxy-substituted divalent hydrocarbon groups, and groups of the formula: R"OR" wherein R" is se lected from the class consisting of divalent hydrocarbon groups and hydroXy-substituted divalent hydrocarbon groups as defined above; R is bonded to N of the formula and is selected from the class consisting of methyl, ethyl and phenyl when taken individually when two R groups are taken together with the N atom of the above formula, a divalent group having a five to six member heterocyclic ring comprising carbon, nitrogen and hydrogen bonded through said N atom to the R group and the remaining R group; X is an anion selected from the class consisting of iodine, bromine, chlorine aryl sulfonate having 6 to 18 carbon atoms, nitrate, nitrite and borate anions, when taken individually; sulfate and sulfite anions when two X groups are taken together; and phosphate anion when three X groups are taken together; and t is an integer of 0 to 1. Preferably X is selected from the class consisting of iodine, bromine, and aryl sulfonate having 6 to 18 carbon atoms, when taken individually, and sulfate when two X groups are taken together. More preferably, X is selected from the class consisting of iodine and bromine and most preferably is iodine. The cationic bis(trimethylsiloxy) silanes, i.e., where x in the above formulas (a) and (l) is 1, are preferred.

Typical divalent groups represented by R in the above formulas include, ethylene, 1,3-propylene, 1,2-propylene, 1,4-butylene, 1,3-butylene, 1,5-pentylene, 1,4-penty1ene and 1,6-hexylene, cycloalkylene including cyclohexylene, cyclopentylene and the like, arylene including phenylene, benzylidene, tolylene, xylylene, naphthylene,

of the formula R"OR" wherein R" is selected from the class consisting of divalent hydrocarbon groups such as those listed above and hydroxyl-substituted divalent hydrocarbon groups such as those listed above, including by way of example, 1,3-propyleneoxy-1,3-propylene, 1,3- propyleneoxy-1,4-butylene, 1,3-propyleneoxy 1,2-butylene, 1,3 propyleneoxy-Z-hydroxy 1,3 propylene, 1,2- propyleneoXy-3-hydroxy-1,4-butylene and the like.

In formula (1) typical groups having a divalent heterocyclic ring represented by two R groups taken together with N of the formula include morpholiniurn,

piperidinium,

pyrrolium, piperazinium, pyridinium and the like.

The organosilicon compounds containing tertiary amino groups bonded to carbon disclosed herein are the ternary amino bis(trihydrocarbylsiloxy) siloxanes of the formula:

MDXM (b) wherein M and x are as defined above and D is a tertiary amino difunctional siloxy unit of the formula:

wherein R and I are as defined above and R is bonded to N of formula (2) and is selected from the class consistirg of methyl and ethyl, when taken individually, and, when two R groups are taken together with the N atom of formula (2), a five to six member monovalent heterocyclic ring comprising carbon, nitrogen and hydrogen bonded through said N atom to said R group.

Typical R and R groups for formula (2) are as listed above for formula (I). Illustrative monovalent groups having a five or six member heterocyclic ring include morpholinyl,

piperidyl,

CH CH cngcih pyrrolyl, piperazinyl, pyridyl and the like. The cationic bis(trimethylsiloxy) silanes, i.e., where x in formulas (b) and (2) above is l, are preferred. V i

The catonic silicones of formula (I) wherein X is iodine or bromine are prepared by reacting a methyl or ethyl iodide or bromide with a tertiary amino bisttrimethylsiloxy) siloxane in accordance with the equation:

wherein R, R, X and t are as previously defined.

Suitable halides are methyl bromide, ethyl bromide, methyl iodide, ethyl iodide and the like.

No special catalysts are needed for reaction (1). It is advantageous, however, to employ a polar solvent which dissolves both reactants and the product. Suitable solvents are the aliphatic alcohols such as n-propanol and the aliphatic ethers such as tetrahydrofuran. The amount of solvent used is not narrowly critical and can range from about 40 to about 100% of the total weight of both reactants.

Atmospheric or superatrnospheric pressures can be used for reaction (1) as may be convenient for the operator. It is convenient to mix both reactants and the solvent and then maintain the resulting mixture at the reaction temperature until the reaction has been completed. However, any convenient order of mixing can be used. When a low boiling halide, such as methyl bromide, is used as a reactant, it is convenient to first mix the solvent and the siloxane and heat the resulting mixture to the reaction temperature. Then, the halide can be added in gaseous or liquid form and the reaction completed at the reaction temperature.

Reaction temperatures for reaction (1) are not narrowly critical and can be in the range of about 50 C. or iess to 80 C. or more. Lower temperatures usually are impractical and high temperatures usually are unnecessary.

The cationic silicone product is conveniently separated from the reaction mixture by rotary evaporation under sub-atmospheric pressure. Any other suitable separation technique may be used. Further purification can be carricd out on the separated product washing the solid product with a liquid aliphatic hydrocarbon such as pentane or hexane. Other purification techniques can be used.

Cationic silicones of formula (1) where the X groups, taken individually or two or three together, are nitrate, borate, nitrite, sulfate, sulfonate, sulfite or phosphate anions, which for convenience are called the non-halide unions. are produced by reacting the product of reaction (I), i.e., a cationic silicone of formula (1) in which X is a halide. with a soluble salt containing the non-halide anion and which forms an insoluble halide. Suitable soluble salts include silver nitrate, silver borate, silver nitrite, silver sulfate, silver aryl sulfonate, and silver sulfite. By double decomposition, the soluble salt exchanges anions with the cationic silicone halide forming the desired cationic silicone non-halide and an insoluble halide which precipitates out. For example, silver sulfate is reacted with a cationic silicone halide of the formula:

lMeasiO zlzlo sitMe) (CH )3N(Me)CHgCH2)g0]I- to form the corresponding sulfate of the formula:

[[MciS i0 ao shim c H N(Me) 01120139201] 3 0-, 2

and insoluble silver bromide which is recovered as a precipitate.

The tertiary amino bisttrimethylsiloxy) siloxane intermediates used as starting materials in reaction (1) for preparing cationic silicones having the formula (1) wherein r=0 are prepared by the addition reaction of the corresponding hydrosiloxane:

and an alkenyl group-containing tertiary organic amine in accordance with the equation:

wherein R, R" and x are as defined above and wherein R is a divalent organic group free of aliphatic unsaturation, having 1 to 16 carbon atoms and selected from the class consisting of divalent hydrocarbon groups, hydroxysubstituted divalent hydrocarbon groups, groups of the formula OR" wherein R is a divalent hydrocarbon group or hydroxy-substituted hydrocarbon group and is bonded to the N atom and wherein the oxygen is bonded to the CH :CH group, and ROR" wherein R" is as defined above. It will be noted that the R group comprises the group C H R"- which is formed when ESlH reacts with CH :CHR' in reaction (2).

The hydrosiloxanes are readily available materials and can be prepared by standard procedures. Suitable hydrosiloxanes include heptamethyltrisiloxane, octarnethyltetrasiloxane, and nonamethylpentasiloxane. The alkenyl group-containing tertiary amines are also available or can be prepared by standard procedures. Illustrative amines are N-allyl-N, N-diethylamine, N-allylpiperidine, N-allylmorpholine, N-methallylmorpholine, N-allyl-N-methylaniline, N-(Z-allyloxy)propylmorpholine, those listed in Table 1 below and the monoallyl or monovinyl ethers of the following amines: N,N-diethyl ethanolamine, N,N- dirnethyl ethanolamine, N,N-diisopropyl ethanolamine, N,N-dimethyl propanolamine, N,N-dihexylethanolamine, N,N-dilauryl propanolamine.

In general, the reaction illustrated by equation (2) can be conducted employing, preferably, from 5 to 30 parts, per million parts by weight of the reactants, of platinum,

e.g., in the form of chloroplatinic acid dissolved, if desired, in a solvent such as, tetrahydrofuran, ethanol, butanol or a mixture of ethanol and ethylene glycol dimethyl ether, or in the form of finely divided elemental platinum supported on a material such as gamma alumina or charcoal. The addition reaction is conducted at a temperature of from 60 C. to 200 C., or preferably at a temperature from about 100 C. to about 140 C. It is preferred to conduct the reaction in the presence of a liquid organic compound or solvent in which the reactants are mutually soluble. Solvents are especially preferred in reaction (2) so as to provide greater compatibility between the reactants. Suitable solvents include aromatic hydrocarbons (e.g., toluene and xylene) and others (e.g., ethylene glycol diethyl ether, diethylene glycol dimethyl ether, diisopropyl ether, and dipropyl ether). Such solvents can be employed in an amount from parts to 1000 parts by weight per 100 parts by weight of the reactants.

The relative amounts of the alkenyl amine and the hydrosiloxane employed are not narrowly critical. Stoichiometric amounts of the reactants up to a slight excess of alkenyl amine, e.g., up to 5% excess, can be used and such slight excess of alkenyl amine can be advantageous from the standpoint of more effective and more complete reaction of silanic hydrogen.

The order in which the alkenyl amine, the hydrosiloxane and the platinum catalyst are mixed in forming a reaction mixture for use in producing the siloxanes of this invention is not critical to obtaining the desired product. The catalyst can be added separately to the alkenyl amine or to the siloxane or can be added to a mixture of these materials. It is preferable to add the catalyst to the hydrosiloxane and then add the alkenyl amine in increments since this technique aids in controlling the reactions, which are often exothermic. Additional catalyst can be added during the course of the reaction in the event the rate of reaction decreases (e.g., due to catalyst poisoning).

The reaction is usually completed within about 1 to about 6 hours and completeness can be readily detected by withdrawing an aliquot sample and testing with a solution of silver nitrate in an ethanol-water solvent.

The tertiary amino 'bis(trimethylsiloxy) siloxane intermediates used as starting materials in reaction (1) for preparing cationic silicones having the formula (1) wherein t=1 are prepared by the reaction of a hydrosiloxane as defined above with an organic amino alcohol in accordance with the equation:

wherein R, R and x are as defined above.

Suitable amino alcohols include N,N-dimethylaminoethanol, N,N diethylaminoethanol, 1-(N,N dimethylamino propanol, N- [2 Z-hydroxyethoxy ethyl] morpholine, the amino alcohols listed in Table 2 below, N,N- diisopropylethanolamine, N,N dimethylpropanolamine, N,N-dihexylethanolamine, N,N dilaurylpropanolamine and the like.

Reaction (3) is carried out in the presence of stannous octoate catalyst which preferably is used in amounts of about 0.5 to about 2.0% based on the total weight of the reactants, although higher or lower amounts can be used, such as in the range of about 0.1 to about 5 wt. percent on the same basis. The reaction conditions specified above for the reaction of equation (2) can also be applied here.

The intermediates produced by the reaction of equations (2) and (3) can be isolated in any convenient way such as by fractional distillation under vacuum or, especially if the intermediate has a high boiling point, rotary evaporation under reduced pressure.

The cationic silicones disclosed and claimed herein are highly useful as foam stabilizers in such applications as the production of highly efficient fire-fighting foams as disclosed in US. Pat. 3,677,347, high quality polyester polyurethane foams by the one-shot technique as disclosed in U.S. Pat. 3,642,670, and high quality polyurethane foams by the mechanical frothing technique as disclosed in US. application Ser. No. 887,305, filed Dec. 22, 1969, now abandoned. The tertiary amino bis(trimethylsiloxy) siloxanes and the cationic silicones disclosed and claimed herein are also useful as emulsifiers for water-poly(dimethylsiloxane) systems, bacteriocides, antistatic agents, wetting agents and mold release agents.

The following examples are presented where all parts and percentages are by weight and all temperatures are On the Centigrade scale. Boiling points, evaporation conditions and distillation conditions are given in degrees Centigrade at a pressure given in millimeters of mercury, e.g., 63/l mm. which means 63 C. at 1 mm. Hg pressure. Washing conditions are expressed in the number of washes and the amount of washing liquid for each Wash, e.g., 6 100 ml. which means washed six times using 100 ml. washing liquid each time. Also, the designation represents the morpholinium group /CH2CH2 I 0 more and the designation represents the piperidinium group CHZCHZ CH2. CHzCH2 EXAMPLE 1 Preparation of [(Me; S i0 )zMe S i(CHz)3i lMealI" A. To a 500 ml. flask equipped with thermometer, stirrer, dropping funnel and nitrogen atmosphere were added heptamethyltrisiloxane (132.2 g., 0.594 mole) and 100 ml. of toluene. The reaction mixture was heated to and then 10 parts per million platinum was added as chloroplatinic acid. To this mixture, N-allyl-N,N-dimethylamine (50.5 g., 0.594 mole) was added dropwise while maintaining the reaction mixture at 80-90. After the completion of addition, the reaction mixture was kept at 80-90 for 1 hr. The mixture was then cooled and neutralized by NaHCO filtered and fractionally distilled. There was obtained 162.0 g. (88.7%) of the intermedi ate, (Me SiO) MeSi(CH NMe which had a boiling point of 63/l mm.

Analysis.-Calc. for C H NO Si C, 46.9; H, 10.7; N, 4.6; Si, 27.4. Found: C, 46.3; H, 10.2; N, 3.8; Si, 26.4%.

B. 60.0 g. (0.195 mole) of this intermediate was dissolved in 50 m1. of tetrahydrofuran. To this mixture, 55.4 g. (0.390 mole) of methyl iodide were added slowly at room temperature with constant stirring. The reaction mixture was stirred at 25 for 1 hour. Removal of solvent by rotary evaporation afforded a white solid which was mixed with hexane (100 m1.) and filtered to give 428 g. (81.7%) of the intermediate.

Analysis.-Calc. for C H INO Si C, 34.7; H, 8.0; I, 28.2; N, 3.1; Si, 18.8. Found: C, 34.9; H, 8.2; I, 27.4; N, 3.0; Si, 18.9%.

The product when dissolved in tap water at a concentration of 1 wt. percent and whipped, produced a firefighting foam that formed a long-lasting, spreading, vaporsecuring film on gasoline. When mixed with a polyestercontaining, blowing agent-containing, polyurethane-forming composition on the basis of 1 wt. pt. per hundred wt. pts. of polyester, 21 high quality, breathable foam was obtained.

EXA M PLE 2 Preparation of oamsiomrosxcnanimact- The amino-modified siloxane was prepared as described in Example 1, Section A. 102.5 g. (0.33 mole) of this compound were dissolved in 200 ml. of tetrahydrofuran in a flask equipped with stirrer, Dry Ice condenser, thermometer and gas dispersion tube. The solution was heated to 60. Then gaseous methyl chloride (40 g., 0.8 mole) was passed into it over a period of 2 hours. After the completion of addition, the reaction mixture was maintration of 1 wt. percent. produced a fire-fighting foam that provided a 1ong-lasting, spreading, vapor-securing film on gasoline.

EXAMPLE 3 Preparation of[(M01810)11\leSi(CII2)al l1\1c3]B1- The amino-modified siloxane was prepared as described in Example 1, Section A. 102.5 g. (0.33 mole) of this compound were dissolved in 150 m1. dry tetrahydrofuran. The solution was charged to a three-necked 500 ml. flask equipped with a Dry Ice condenser, heating mantle, stirrer and thermometer. Methyl bromide was slowly bubbled in (47.5 g., 0.5 mole). This caused an exotherm to 45. After the completion of addition, the mixture was heated to reflux (66) and kept at that temperature for four hours. The mixture was then cooled and solvent was removed by rotary evaporation. This white solid residue was mixed with 200 ml. of hexane and filtered to give 86.0 g. (65%) of the product.

Analysis.Calc. for C H l3rNO Si C, 38.7; H, 8.9; Br, 19.8; N, 3.4; Si, 20.9. Found: Br, 18.9: Si, 20.1%.

The product when dissolved in tap water at a concentration of 1 wt. percent, produced a fire-fighting foam that provided a long-lasting, spreading, vapor-securing film on gasoline.

EXAMPLE 4 Preparation of [(110 51O)gl\1eSi(CI1 (Me)l IC,I11 ]I- A. N-allylpiperidine (62.6 g., 0.5 mole) was added to heptamethyltrisiloxane (111.2 g., 0.5 mole) almost at once. The apparatus comprised a three-necked flask, fitted with thermometer, condenser and stirrer. The reaction was carried out under nitrogen atmosphere. 200 ml. of dry xylene were used as solvent. To this mixture 15 parts per million of platinum as chloroplatinic acid were added and then refluxed at 138 until all of the SiH had been consumed as evidenced by the silver nitrate test. After the completion of the reaction (1 hour), the mixture was cooled and neutralized by NaHCO filtered and all matter volatile at /1 mm. was removed by rotary evaporation. The residue was fractionally distilled at 98/0.2 mm. to give the desired intermediate (148.2 g.) in 85.4% yield.

Anaiysis.CalC. for C H NO Si C, 51.8; H, 10.7; N. 4.0; Si, 24.2. Found: C, 49.4; H, 10.0; N, 3.9; Si, 24.3%.

B. 69.53 g. (0.2 mole) of the above intermediate were reacted with methyl iodide (33.06 g., 0.232 mole) in a 500 ml. round bottom flask without solvent. The mixing of the two reagents was carried out With vigorous stirring. There was an exothermal reaction noted and soon after the addition was complete, a white precipitate formation was apparent. After about 10 minutes the reaction mixture solidified. To this mixture, 250 ml. of pentane were added, mixed Well and filtered. The precipitate was washed with IX ml. of pentane to give 85.0 g., 87% of the product.

Analysis.Ca1c. for C H INO SI C, 39.3; H, 8.2; I. 25.9; N, 2.9; Si, 17.2. Found: C, 40.1; H, 8.3; I, 22.5; N, 3.0; Si, 18.0%.

The product when dissolved in tap water at a concentration of 1 wt. percent, produced a fire-fighting foam that provided a long-lasting, spreading, vapor-securing film on gasoline.

When mixed with a polyester-containing, polyurethaneforming composition, on the basis of 1 wt. pt. per hundred wt. pts. of polyester, there was produced a high quality foam.

EXAMPLE 5 Preparation of l(MmsiU)zMeSi(Cllmfllle)N(CII2CH:)20]I A. N-allylmorpholine (100.0 g., 0.787 mole) was added to heptamethyltrisiloxane (175.0 g., 0.787 mole) almost at once. The apparatus comprised a three-necked flask, fitted with thermometer, condenser and stirrer. The reaction was carried out under nitrogen atmosphere. Toluene (200 ml.) was used as solvent. To this mixture 10 parts per million of platinum were added as chloroplatinc acid. The reaction mixture was then refluxed for 3 hours. After the completion of the reaction, the mixture was cooled, neutralized by NaHCO and filtered. Removal of the volatiles at 30/1 mm. by rotary evaporation afforded a straw colored residue,

261.7 g. in 95.2% yield.

Analysis-Cale for C H NO Si C, 48.1; H, 10.0; N. 4.0; Si, 24.1. Found: C, 47.6; H, 10.3; N, 3.8; Si, 22.2%.

B. 100 g. (0.286 mole) of the above prepared siloxane were dissolved in 100 ml. tetrahydrofuran. To this mixture 60.9 g. (0.429 mole) of methyl iodide were added and the mixture was stirred at 25 for 16 hours. Removal of the solvent by rotary evaporation afforded a white solid which was washed with 200 ml. of pentane and filtered. There was obtained 136.9 g. (97.8%) of the product.

Analysis-Cale. for C H IO Si C, 36.6; H, 7.7; I, 25.8; N, 2.9; Si, 17.1. Found: C, 36.7; H, 8.8; I, 25.4; N, 2.8; Si, 17.0%.

When mixed with a polyurethane forming composition and mechanically frothed with air, a stable, curable froth having a density of 16 pounds per cubic foot or less was obtained.

EXAMPLE 6 Preparation of [(NkfisiOhllesl(CIIZ)S(1\EG)ZNCBH5II A. N-allyl-N-methylaniline (50.0 g., 0.339 mole) was added to heptarnethyltrisiloxane (75.5 g., 0.339 mole) dissolved in 100 ml. of xylene. To this mixture 15 parts per million of platinum were added as chloroplatinic acid. The reaction mixture was heated at -135 for 1 hour. After this time all of the SiH had been consumed as evidenced by the silver nitrate test. After cooling, the mixture was neutralized by NaHCO and filtered. Removal of solvent by rotary evaporation at 30/ 1 mm. a for ed th terme i e.

When mixed with a polyester-containing, polyurethaneforming composition, on the basis of 1 wt. pt. per hundred wt. pts. of polyester, there was produced a high quality foam.

When mixed with a polyurethane-forming composition 5 I (Me S1O) MeS1(CH2)3( and mechamcally frothed with air, a stable, curable froth 1n 89% yleld (111.0 g.). having a density of 16 pounds per cubic foot or less was Analysis.Calc. for C H NO' S1 C, 55.2; H, obtained.

, 2. d: C, 58.4; 9.5; N, 4.2; S',

53337?- S1 2 8 Foun H 1 1O MPLE 8 B. 20.0 g. (0.054 mole) of the above prepared siloxane (Preparation of [(MeasiohMesio(011020(CH2)2(Me)I(0H2OHz)zO]I were reacted with methyl iodide (10.5 g., 0.073 mole) in A N [2 (2 h o ydroxyethoxy) ethyl] morphohne (43.7

30 of benzene hour? a 25 fter remtgal of g., 0.25 mole) and heptamethyltrisiloxane (55.5 g., 0.25 the by rotary evaPPPatm at 30 /1 i 3 g mole) were reacted together in the presence of 0.2 wt. sultant Sohd was F wlth Penta-ne (150 m an percent stannous octoate catalyst. The apparatus comtfc t g 3 tggfyggi i gggoi d (902592) of the prod prised a three-necked flask, fitted with thermometer, condenser and stirrer. The reaction was carried out under Analyszs. C alc. for C H INO S1 t C, 42.2; H, nitrogen atmosphere. The reaction mixture was heated at N Found' C 110-120 with constant stirring for 4 hours. Evolution of hydrogen was noted soon after heating started. The

h mlxed Y a polyester'c9ntalnlng Polyurethane completion of the reaction was evidenced by the negative formmg composltlon on the ham of 1 per i silver nitrate test for SiH. The intermediate, dred wt. pts. of polyester, there was produced a hlgh quality foam (M So M SO(CH 0(CH N CH CH o EXAMPLE7 a 2 22 22( 2 22 Preparation0f[Me;;SlO)zMeSi(CH2)3OCHMeCH (Me)fi(CHzCH2)2O]I- was obtained in 100% 1 A. Heptamethyltrisiloxane (111.2 g., 0.5 mole) and 4 y 15 3'7 5 3 5 150 ml. of toluene were placed in a 500 ml. flask 3. $1, Found} 275%- equipped with condenser, stirrer, thermometer and drop- T1115 Intermediate go 111016) and y ping funnel. The solution was heated to 100 and 20 parts lodlde -a 0-138 mole) Were mlXed togethef In h per million platinum were added as chloroplatinic acid. Presence of 100 of letfahydrofuran- The reactlon lX- Tozthi'svmixture, N 2 11 1 l h li (93 5 ture was allowed to st1r for 16 hrs. at 25. Removal of g., 0L5 r'noletwas added slowly over a period of 15 solvent by rotary evaporation afforded a slightly colored minutes, and then the mixture was maintained at reflux Solid P d in 825% y f temperature (110) for 2 hours. After cooling, the mixy for 16 40 5 a C, H, I, ture was neutralized by NaHCO, and filtered. The inter- N, Found! mediate, 2.2; Si, 21.7%.

The product when dissolved in tap water at a concen- (M63810)2MS1(CH2)3OCHM6CH2N(CH2CH2)2O 40 tration of 1 wt. percent, produced a fire-fighting foam was isolated by fractional distillation at 114/0.14 mm. that provided a long-lasting, spreading, vapor-securing The yield was 163.8 g. (80%). film on gasoline.

Analysis.-Calc. for C1qH41NO4Si3I C, 50.1; H, 10.1; When mixed with a polyurethane-forming composition N, 3.4; Si, 20.6. Found; C, 47.4; H, 9.7; N, 3.3; Si, and mechanically frothed with air, a stable, curable froth 205%, having a density of 16 pounds per cubic foot or less was B. This intermediate'(80.0 g., 0.195 mole) and methyl obtained. iodide (55.5 g., 0.39 mole) and 100 g. of tetrahydrofuran Using the procedure of Example 1, Section A, hepawere mixed in a 500 m1; flash equipped with stirrer and methylsiloxane is reacted with the allylic amines listed in condenser. The reaction mixture was maintained at reflux Table 1 to produce the tertiary aminohydrocarbyl bis(trifor 3 hours. After this time the reaction mixture was hydrocarbylsiloxy) silanes also listed in Table 1.

TABLE 1 Amine Product CHz=CHCH2NEtz (MeaSiOhMeSKCHDaNEtz CHz=CHCHMeN(CH2CH2)2O (Me3Si0)2MeS1CH2CH2CHMGN(CH2CH2)2O cH2=0HcH2ocH1CH(0H)OH2N(CH1CH;)1O [MeQSiOhMeSKCHZhOCH2CH(OH)CH2N(CHzCH2)zO cooled and the solvent was removed by rotary evapora- Using the procedure of Example 8, Section A, heptaat 300/1 to glve 102 (943775) of the Product methylsiloxane was reacted with the hydroxyamines listed Analysis.-Calc. for C H INO S1 C, 39.3; H, 8.0; I, T M 2 t d th t h d b 1 23.1; N, 2.6; Si, 15.3. Found: c, 38.2; H, 7.6; I, 23.1; N, m a e O 3 f Y 25; Si, 153% bis(trihydrocarbylsiloxy) silanes also listed in Table 2.

TABLE 2 Amine Product HOCHMeCHzNMez (Me3SiO)2MeSiOOHMeCHgNMe HOCH2CHzNMe2 (MesSlO)zMeSiOCHzCHzNMez e z iltiig hifiibmcmo (Me SiO) 2MeSiOCH(Me)C1T2N(CH2-CH2)20 The product when dissolved in tap water at a concentration of 1 wt. percent, produced a fire-fighting foam that provided a long-lasting, spreading, vapor-securing film of gasoline.

Using the procedure of Section B of Examples 1 or 4 through 8 or the procedures of Example 2 or 3, corresponding to the alkyl halide used, the siloxanes listed in Table 3 were reacted with the alkyl halides listed in Table 0 3 to produce the products listed in Table 3.

TABLE 3 Alkyl Siloxane halide Product (M83SiO)2M8S1(CH2)aNMBz 131.1

(MezSlOhMeSi(CHzhNMezEt I" (MeasiOhMesflCHmNEtz. Mel 1 (Me;SiO)zMeSi(CHz)aNEtzMe I- u b (MeaSiOhMeSKCHzhNEta I b MeBr (Me3SiO) MeSi(CH2)aNEt2Me Br- MeaSiO)zMBSKCHzhCHMON(CHzCHz)2O Mel (IVIeaSiO)zMOSi(CH2)2CHMB(M6)N(CH2CH2):O 1+ B (MeaSi0)2MeSl(CHz)aN(CHzCHz)z0 MeBr (MeaSiOhMeSi(CH2)3(MB)N(CHzCHz)zO Br e (MeaSiOhMGSi(CH2)3NC5H10 EU 4- 1 (Me SiO)2MeSi(CHz)3(Et)NC5Hm (Me SiO)zMeSiOCHMeCHzNMe Mei (M3SiO)zl\/IQS1OCHMOCHZNMBa I- e EtI i 1 (MegSiO)2MeSiOCHMeCH NMezEt I- (MmSiOhMeSiO(CHz)zNMez Mel 4- (MmSiOhMeSiO(CHmNMe I- (MmSiOhMeSiO(CHz)aNEtz MeI [(MeaSiO)2MeSiO(CHmNEtzMe11- (Me;SiO)zMeSiO(CHz)zNEt3 I- (Me;SiO) MeSiOCHMeCHzNEtq MeI (MegSiO)zMeSiOCHMeCHzNEtzMe I (Me3SiO);MeSiOCH(Me)CHzN(CHzCHz)z0 MeI (Me3SiO)gMeSiOCH(Me)CHz(Me)N(CH2CH2)zO I- (Me SiOhMeSi(CH:)30CHzCH(OH)CH2N(CH CH2):O Me! The product when dissolved in tap water at a concentration of 1 wt. percent, produced a fire-fighting foam that provided a long-lasting, spreading, vapor-securing film on gasoline.

When mixed with a polyester-containing, polyurethane-forming What is claimed is: 1. A cationic amino bis(trimethylsiloxy) siloxane having the formula:

2. A tertiary amino bis(trimethylsiloxy) siloxane having the formula:

11/1971 Yetter 260-4481 N DANIEL E. WYMAN, Primary Examiner P. F. SHAVER, Assistant Examiner US. Cl. X.R. 

